*Excludes Observations that spanned multiple years

Pre 19705
19701
19715
19724
19730
19740
19751
19760
19770
19781
19792
19800
19810
19825
19831
19840
198545
198677
1987120
1988203
198965
199068
1991215
1992112
1993196
1994273
1995306
1996211
1997220
199835
199942
200033
200193
200225
200392
2004100
200570
200638
200766
200860
200964
201085
201163
2012100
2013112
201489
201589
201676
201775
201844
2019106
202037
2021110
202257
202329
20241
Total3927